Hydrogen-Antihydrogen Interactions

Abstract

The interaction potential between hydrogen and antihydrogen is obtained by a variational calculation. A potential maximum is found, but its peak is below the dissociation limit. A classical calculation shows that the cross section for total annihilation decreases monotonically from $31{a_0}^2$ at 0.01 eV to $4{a_0}^2$ at 20 eV.